Washing machine

ABSTRACT

The present disclosure discloses a washing machine, including a washing drum, being a water containing tub during washing; a balancing ring, arranged on the washing drum; and a sealing structure, configured to prevent water from overflowing between the washing drum and the balancing ring. According to the washing machine, capacity of the washing drum can be expanded; and meanwhile, since the sealing structure is arranged between the washing drum and the balancing ring, water is prevented from overflowing out of the washing drum between the washing drum and the balancing ring, so as not to corrode a washing machine case or other components due to splashing as time goes, or not to cause short circuit.

TECHNICAL FIELD

The present disclosure belongs to the field of washing machines, and particularly relates to a washing machine.

BACKGROUND

A washing machine is designed as an appliance for washing clothes using electric power. Generally speaking, the washing machine includes a tub, used for containing washing water; a rotating drum, rotationally mounted in the tub; an impeller, rotationally mounted at the bottom of the rotating drum; a motor and clutch, configured to enable the rotating drum and the impeller to rotate; and a balancing ring, arranged on the rotating drum to supplement weight to keep balance when the rotating drum is rotated. When the rotating drum and the impeller are rotated at a state where clothes and detergents are introduced into the rotating drum, the washing water is agitated by the impeller and the clothes introduced into the rotating drum, so as to wash off dirt on the clothes.

In order to increase washing capacity of the washing machine, a large rotating drum is needed, that is, a height or diameter of the rotating drum needs to be increased. If the rotating drum has a large size, the tub containing the rotating drum and a casing containing the tub also need to be increased along with increase of the rotating drum. A dimensional increase of the casing corresponding to the appearance of the washing machine is confined to the space of an area where the washing machine is mounted. For a common user, the space for the washing machine in the room is limited, and it is not logical to achieve the purpose of increasing the capacity of a washing drum by increasing the casing of the washing machine, so that how to increase the capacity of the rotating drum on the premise of not increasing the casing of the washing machine becomes a big problem puzzling designers. A non-perforated washing drum solves the problem of capacity expansion, the tub is canceled or miniaturized, and the rotating drum is adopted as a washing tub containing the washing water, and is configured as the non-perforated washing drum.

When the washing drum is rotated at a high speed, water in the washing drum ascends along the wall of the washing drum under the action of centrifugal force and is discharged from a water outlet at an upper end, a part of the water continues ascending to a balancing ring connecting part and overflows out of the washing drum from the balancing ring connecting part. Thus, as time goes, the overflowing washing water is likely to corrode the case and other structures, and short circuit is also likely to be caused.

In view of this, the present disclosure is particularly proposed.

SUMMARY

A technical problem to be solved in the present disclosure is to overcome defects in the prior art, and provide a washing machine.

To solve the technical problem, a basic concept of technical solutions in the present disclosure is as follows:

the present disclosure aims to provide a washing machine, including:

a washing drum, serving as a water containing tub during washing;

a balancing ring, arranged on the washing drum; and

a sealing structure, arranged between the washing drum and the balancing ring and configured to prevent water from overflowing between the washing drum and the balancing ring. Preferably, the balancing ring is supported by the upper end part of the wall of the washing drum, and the sealing structure is configured to prevent water from overflowing between the upper end part of the wall of the washing drum and the balancing ring.

Further, the mounting part includes an annular groove with a downward opening; the matching part includes a support which extends into the annular groove; the sealing structure is arranged between the annular groove and the support; and preferably, the support is a smooth support.

Further, the annular groove is formed in the outer side wall of the balancing ring.

Preferably, the outer side wall of the balancing ring partially extends to an inner circumference to form an annular top of the annular groove, the outer side wall of the balancing ring at the outer end of the annular top continues extending to the bottom of the balancing ring to form an outer annular wall of the annular groove, and the outer side wall of the balancing ring at the inner end of the annular top extends to the bottom of the balancing ring to form an inner annular wall of the annular groove.

More preferably, the sealing structure is arranged between the annular top and the support.

Further, the inner annular wall protrudes out of the outer annular wall and extends to the bottom of the balancing ring, and preferably, the protruding part of the inner annular wall is in sealed connection with the washing drum at the lower end of the support through a screw.

Further, the smooth support is formed by curling the upper end of the washing drum outwards.

Further, the smooth support is formed by folding the upper end of the washing drum outwards.

Further, the washing machine also includes a drainage structure, wherein the drainage structure includes a dewatering channel that is arranged on the outer wall of the washing drum, communicates with the washing drum and is used for discharging water thrown out from the washing drum, and the water inlet end of the dewatering channel is arranged on the upper end of the washing drum.

Further, a water inlet for cooperatively mounting the water inlet end is arranged in the washing drum, and the water inlet is arranged below the balancing ring.

Preferably, the upper edge of the water inlet is parallel to the bottom of the balancing ring.

Preferably, the water inlet end is mounted at the water inlet in a sealed manner.

Further, the sealing structure is an annular sealing ring which is squeezed between the washing drum and the balancing ring and has a deformation, or the sealing structure is an annular sealant.

Through the technical solutions, compared with the prior art, the present disclosure has the following beneficial effects:

1. The sealing structure is arranged between the washing drum and the balancing ring, so that water is prevented from overflowing out of the washing drum between the washing drum and the balancing ring, so as not to corrode a washing machine case or other components due to splashing as time goes, or not to cause short circuit.

2. The washing machine and the balancing ring disclosed by the present disclosure are simple and convenient to mount, capacity expansion is not affected, and the mounting cost is reduced.

3. The washing drum is a non-perforated washing drum, so that a space is provided for capacity expansion of the washing machine.

Specific embodiments of the present disclosure are further described below in detail in combination with drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings serving as one part of the present disclosure are intended to provide a further understanding for the present disclosure. Schematic embodiments and illustrations of the present disclosure are intended to explain the present disclosure, rather than an improper limitation of the present disclosure. Apparently, the accompanying drawings in the description below are merely some of the embodiments of the present disclosure. Other drawings may be obtained by those ordinary skilled in the art without making creative labor in accordance with these drawings. In the drawings:

FIG. 1 is a structural schematic diagram of a washing machine;

FIG. 2 is an enlarged drawing of part A of FIG. 1;

FIG. 3 is a structural schematic diagram of a washing machine according to embodiment II of the present disclosure; and

FIG. 4 is an enlarged drawing of part B of FIG. 3.

In the drawings: 1 washing drum, 101 matching part, 102 water retaining part, 103 water collecting chamber, 104 water inlet, 2 balancing ring, 201 mounting part, 3 sealing structure, 4 water channel.

It should be indicated that, these accompanying drawings and textual descriptions are intended not to limit the concept scope of the present disclosure in any manner, but to explain the concept of the present disclosure to those skilled in the art with reference to specific embodiments.

DETAILED DESCRIPTION OF THE EMBODIMENTS

To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, a clear and complete description of the technical solutions in the embodiments will be given below, in combination with the accompanying drawings in the embodiments of the present disclosure. Embodiments described herein are only adopted to explain the present disclosure, rather than a limitation of the scope of the present disclosure.

It should be understood in the description of the present disclosure that, terms such as “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “inner”, “outer”, etc. indicate direction or position relationships shown based on the drawings, and are only intended to facilitate the description of the present disclosure and simplify the description rather than to indicate or imply that the indicated device or element must have a specific direction or constructed and operated in a specific direction, and therefore, shall not be understood as a limitation to the present disclosure.

In the present disclosure, it should be noted that, unless otherwise specifically regulated and defined, terms such as “installation”, “connected”, “connecting” and the like shall be understood in broad sense, and for example, may refer to fixed connection or detachable connection or integral connection, may refer to mechanical connection or electrical connection, and may refer to direct connection or indirect connection through an intermediate medium. For those ordinary skilled in the art, the specific meanings of the above terms in the present disclosure may be understood according to concrete conditions.

Embodiment I

As shown in FIG. 1-2, the present embodiment provides a washing machine including: a washing drum 1, serving as a water containing tub during washing; a balancing ring 2, arranged on the washing drum 1; and a sealing structure 3, arranged between the washing drum 1 and the balancing ring 2, and configured to prevent water from overflowing between the washing drum 1 and the balancing ring 2.

In the solution, the washing machine disclosed by the embodiment is not equipped with an outer drum. The washing drum 1 may serve as the water containing tub, i.e. an inner drum 2 with dewatering holes in an upper part only and without holes in a middle part or a lower part. In case of dewatering, washing water ascends to the dewatering holes along the wall of the washing drum under the action of centrifugal force, and is thus discharged out of the washing drum 1. Under normal circumstances, the balancing ring 2 is arranged on the washing drum 1 of an impeller type washing machine. Since the balancing ring 2 and the washing drum 1 are not integrally formed, but mounted together later, water flow ascending along the wall of the washing drum under the action of centrifugal force may easily overflow from a mounting gap between the washing drum 1 and the balancing ring 2, and splashing in all directions may be caused under the action of high-speed rotation. Thus, as time goes, a washing machine case or other components are likely to be corroded by splashing of water, or short circuit may be caused. The present disclosure adopts the sealing structure 3, so as to prevent water from overflowing between the washing drum 1 and the balancing ring 2. A good sealing effect can be achieved if the sealing structure 3 is arranged between the washing drum 1 and the balancing ring 2, and in addition, the sealing structure 3 can be easily fixed. A better effect can be achieved in comparison with a case where the sealing structure is arranged on the outer side of the washing drum 1 or the balancing ring 2.

Further, the balancing ring 2 is provided with a mounting part 201; a matching part 101 cooperating with the mounting part 201 is arranged at the upper end of the washing drum 1; and the sealing structure 3 is arranged between the mounting part 201 and the matching part 101.

In the solution, the balancing ring 2 is mounted on the washing drum 1 through cooperation of the mounting part 201 and the matching part 101, the sealing structure 3 is arranged between the mounting part and the matching part, a good sealing effect is achieved, the sealing structure 3 is also easily fixed and cannot be easily damaged or disconnected from an original position to cause failure of a sealing function under the action of external force or in long-term use.

Further, the mounting part 201 includes an annular groove with a downward opening, the matching part 101 includes a support which extends into the annular groove, the sealing structure 3 is arranged between the annular groove and the support, and preferably, the support is a smooth support.

In the solution, the matching part 101 is contained by the annular groove, and the matching part 101 is mounted through the support and supports the balancing ring 2 on the washing drum 1. The annular groove is opened downwards. After the balancing ring 2 is mounted, the support extends into the annular groove, under the action of gravity, the balancing ring 2 is not likely to be disconnected from the washing drum 1, and under the action of the annular groove, movement of the balancing ring 2 in a radial direction is also limited. In the preferable embodiment, the support is a smooth support, so as to avoid consequences that the edge of a sharp support is likely to cause scratches or the sealing structure 3 is damaged to cause failure of a sealing effect, or even the balancing ring 2 is damaged or broken by a sharp support.

Further, the annular groove is formed in the outer side wall of the balancing ring 2.

Preferably, the outer side wall of the balancing ring 2 partially extends to an inner circumference to form an annular top of the annular groove; the outer side wall of the balancing ring 2 at the outer end of the annular top continues extending to the bottom of the balancing ring 2 to form an outer annular wall of the annular groove; and the outer side wall of the balancing ring 2 at the inner end of the annular top extends to the bottom of the balancing ring 2 to form an inner annular wall of the annular groove.

Further preferably, the sealing structure 3 is arranged between the annular top and the support.

In the solution, the annular groove may be formed in the bottom of the balancing ring 2, or is arranged on the side wall of the balancing ring 2. The annular groove in the embodiment is arranged on the outer side wall of the balancing ring 2, and in that case, the external space of the washing drum 1 is not excessively occupied by the balancing ring 2, and capacity expansion of the washing drum 1 is not affected. In the preferred embodiment, the annular top is propped against the support, and the outer annular wall and the inner annular wall are used for limiting movement of the support in the radial direction. In the more preferable embodiment, the inner annular wall is in interference fit with the inner wall of the washing drum 1, so that the balancing ring 2 is stably mounted without phenomena such as displacement or disconnection. In the preferable embodiment, the sealing structure 3 is arranged between the annular top and the support, and then a good sealing effect is achieved. Meanwhile, the sealing structure 3 is also easily fixed so as to avoid consequences that the sealing effect is failed as the sealing structure 3 is disconnected or displaced, then water between the washing drum 1 and the balancing ring 2 overflows out of the washing drum 1, as times goes, the washing machine case or other components are corroded by splashing of water, or short circuit is caused.

Further, the inner annular wall protrudes out of the outer annular wall and extends to the bottom of the balancing ring 2, and preferably, the protruding part of the inner annular wall is in sealed connection with the washing drum 1 at the lower end of the support through a screw.

In the solution, the inner annular wall protrudes out of the outer annular wall and extends to the bottom of the balancing ring 2, that is, the height of the inner annular wall is larger than that of the outer annular wall, so that the inner annular wall cooperates with the washing drum 1 to mount the balancing ring 2 conveniently. In the preferable embodiment, a part, protruding out of the outer annular wall, of the inner annular wall is in sealed connection with the washing drum 1 at the lower end of the support through a screw, so that fixation and connection of the balancing ring 2 are further ensured, an accidental phenomenon that the balancing ring 2 is shaken, displaced or disconnected from the washing drum 1 when the washing drum 1 is rotated at a high speed is prevented, the overall safety is improved, and a balancing effect of the balancing ring 2 performs well.

Further, the smooth support is formed by curling the upper end of the washing drum 1 outwards.

Further, the smooth support is formed by folding the upper end of the washing drum 1 outwards.

In the solution, a drum wall at the upper part of the washing drum 1 may function as the support directly, but since the wall of the washing drum 1 is generally thin, the support may be sharp and cannot easily fix the balancing ring 2 together with the annular groove if the drum wall at the upper part functions as the support directly, the balancing ring 2 cannot be conveniently fixed due to thin wall even though the drum wall has a round corner; and meanwhile, sealing cannot be achieved conveniently, either. In the embodiment, the smooth support is formed by curling the upper end of the washing drum 1 outwards, or the smooth support is formed by folding the upper end of the washing drum 1 outwards, so that the contact area of the support and the annular groove is increased, the balancing ring 2 is solidly mounted without accidents such as shaking and displacement.

Further, the washing machine further includes a drainage structure, wherein the drainage structure includes a dewatering channel 4 that is arranged on the outer wall of the washing drum 1, communicates with the washing drum 1 and is used for discharging water thrown out from the washing drum 1, and the water inlet end of the dewatering channel 4 is arranged on the upper end of the washing drum 1.

Further, a water inlet 104 for cooperatively mounting the water inlet end is formed in the washing drum 1, and the water inlet 104 is arranged below the balancing ring 2.

Preferably, the upper edge of the water inlet 104 is parallel to the bottom of the balancing ring 2.

Preferably, the water inlet end is mounted at the water inlet 104 in a sealed manner.

In the solution, the water inlet 104 is arranged below the balancing ring 2, so that water can be discharged out from the washing drum 1 smoothly. If the water inlet is not arranged below the balancing ring 2, water is likely to be accumulated between the washing drum 1 and the balancing ring 2 and overflows out of the washing drum 1. In the preferable embodiment, the upper edge of the water inlet 104 is parallel to the bottom of the balancing ring 2, so that water is further prevented from being accumulated between the balancing ring 2 and the washing drum 1, and a good sealing effect may be achieved. In the preferable embodiment, the water inlet end is mounted at the water inlet 104 in the sealed manner, so as to avoid consequences that water overflows out of the washing drum 1 between the water inlet end and the water inlet 104, the washing machine case or other components are corroded by splashing of water as time goes, or short circuit is caused.

Further, the sealing structure 3 is an annular sealing ring which is squeezed between the washing drum 1 and the balancing ring 2 and has a deformation, or the sealing structure 3 is an annular sealant.

Embodiment II

As shown in FIG. 1 and FIG. 2, the present embodiment provides a washing machine, including:

a washing drum 1, wherein the washing drum 1 is a water accommodating drum during washing;

a balance ring 2, arranged at the top part the washing drum 1; and

a sealing structure 3, configured to prevent water from overflowing between the washing drum 1 and the balance ring 2.

In the above solution, the washing machine of the present embodiment is not provided with an outer drum. The washing drum 1 is used as a water accommodating drum, and the washing drum 1 is an inner drum which is provided with dewatering holes only in an upper part and provided with no holes in a middle part and a lower part. During dewatering, washing water climbs up to the dewatering holes along a drum wall under the action of a centrifugal force, and is then discharged out of the washing drum 1. Generally, the balance ring 2 is arranged on the top part of the washing drum 1 of the washing machine. The balance ring 2 and the washing drum 1 are mounted together in the later stage instead of being integrated, so that a water flow climbing up along the drum wall under the action of the centrifugal force may overflow from a mounting gap between the washing drum 1 and the balance ring 2 and splash all over under the action of high-speed rotation, and after a long time, the water flow may splash to corrode a washing machine case body or other components or cause a short circuit.

The sealing structure 3 is provided in the present disclosure to prevent water from overflowing from the space between the washing drum 1 and the balance ring 2.

Further, the sealing structure 3 is arranged between the washing drum 1 and the balance ring 2.

In the above solution, the sealing structure 3 is arranged between the washing drum 1 and the balance ring 2 to achieve a better sealing effect, and is fixed more easily. Compared with a sealing structure arranged on an outer side of the washing drum 1 or the balance ring 2, the sealing structure 3 of the present disclosure has a better sealing effect.

Further, the balance ring 2 is provided with a mounting part 201. An upper end of the washing drum 1 is provided with a matching part 101 fitted with the mounting part 201. The sealing structure 3 is arranged between the mounting part 201 and the matching part 101.

In the above solution, the balance ring 2 is mounted on the top part of the washing drum 1 through mutual fitting of the mounting part 201 and the matching part 101. The sealing structure 3 is arranged between the mounting part and the matching part to achieve the better sealing effect, and the sealing structure 3 is easily fixed. Therefore, the phenomenon that the sealing structure cannot continue to achieve the sealing effect because of easy breakage or separation from an original position under external force or after long-time use is avoided.

Further, the mounting part 201 includes an annular bulge radially protruding from the side wall of the balance ring 2; the matching part 101 includes an annular groove matched with the annular bulge; and the sealing structure 3 is arranged between the annular bulge and the annular groove.

In the above solution, the annular bulge is provided to facilitate the installation of the balance ring 2. Of course, an inwards sunken recess may also be selectively arranged on the side wall of the balance ring 2 and used as the mounting part 201. However, arrangement of the recess may affect the size and the intensity of the balance ring 2 and reduce the balance effect, so that in the present application, it is preferred that the mounting part 201 includes the annular bulge protruding from the side wall of the balance ring 2.

Further, the washing drum 1 further includes a water retaining part 102 arranged below the annular groove and configured to narrow a gap between the washing drum 1 and the balance ring 2 to retain water; a water collection cavity 103 is formed by the washing drum 1, the water retaining part 102 and the balance ring 2; and the water collection cavity 103 is configured to collect rising water.

In the above solution, the washing drum 1 further includes the water retaining part 102. The water retaining part 102 narrows the gap between the washing drum 1 and the balance ring 2, and when the water flow rises to the water retaining part 102, a part of the water is blocked from reaching the annular groove and overflowing, via the inside of the annular groove, out of the washing drum 1. Thus, a sealing pressure of the sealing structure 3 is reduced. The water collection cavity 103 narrows the gap between the washing drum 1 and the balance ring 2 due to the existence of the water retaining part 102, so that a higher pressure is required when the water passes through the water retaining part 102, and most of the water is collected.

Further, the washing machine further includes a drainage structure. The drainage structure includes a dewatering passage which is arranged on an outer wall of the washing drum 1, communicates with the washing drum 1 and is configured to drain water thrown out by the washing drum 1; and a water inlet end 104 of the dewatering passage is arranged on the top part of the washing drum 1.

Further, the water inlet end 104 is arranged on the water collection cavity 103 below the water retaining part 102.

In the above solution, the water inlet end 104 is arranged on the water collection cavity 103, so that boosted water in the water collection cavity 103 can more easily enter the dewatering passage from the water inlet end 104 and is then discharged.

Further, the water retaining part 102 is a necking part formed by retraction from an outer side to an inner side of the washing drum 1.

Further, an upper end of the necking part extends to a periphery to form a supporting part for supporting the mounting part 201 of the balance ring 2; the supporting part extends upwards to form an accommodating part surrounding the mounting part 201 of the balance ring 2; and an upper end of the accommodating part is inwards flanged to form a fixing part for fixing the mounting part 201 of the balance ring 2.

Further, the supporting part, the accommodating part and the fixing part together form an annular groove with an inward opening. Preferably, all corners formed by the necking part and the annular groove are rounded corners.

In the above solution, the supporting part is a bottom surface of the annular groove. The accommodating part is a side surface of the annular groove. The fixing part is a top surface of the annular groove. The accommodating part can accommodate the mounting part 201 and limit a radial movement of the balance ring 2. All the corners formed by the necking part and the annular groove are rounded corners. The rounded corners can prevent operators from being cut in a mounting or carrying process and also prevent damage caused by sharp corners to the balance ring, and can further avoid damage, in a rotating process, to other pipelines and elements in the washing machine at the same time.

Further, the sealing structure 3 is arranged between the fixing part and the annular bulge.

In the above solution, the sealing structure 3 can be arranged between the supporting part and the annular bulge, or can be arranged between the accommodating part and the annular bulge, or can be arranged between the fixing part and the annular bulge as mentioned in the present embodiment. The sealing structure 3 arranged between the supporting part and the annular bulge is subjected to an extra pressure from the balance ring 2, so that the sealing structure 3 is easy to break, and is inconvenient to install below the annular bulge. The sealing structure 3 arranged between the accommodating part and the annular bulge is subjected to radial squeezing force provided by the washing drum 1 and the balance ring 2 during rotation of the washing drum, so that the sealing structure 3 is easy to break. The sealing structure 3 arranged between the fixing part and the annular bulge is subjected to a minimum pressure and thus unlikely to break, and is convenient to install and effective in sealing.

Further, the sealing structure 3 is of a flat sheet structure. Preferably, a friction coefficient of a fitting surface between the sealing structure 3 and the annular bulge is larger than friction coefficients of other surfaces.

In the above solution, the sealing structure 3 is of the flat sheet structure because the flat sheet structure is not prone to curl, displace or deform during rolling and flanging of the fixing part. Generally, the sealing structure 3 is of the flat sheet structure. The friction coefficient of the fitting surface between the sealing structure 3 and the annular bulge is larger than friction coefficients of other surfaces, so that the sealing structure 3 is not prone to motion or curling during rolling and flanging of the fixing part.

Further, the sealing structure 3 is an annular sealing ring which is squeezed between the washing drum and the balance ring and has certain deformation.

Embodiment III

In the present embodiment, the difference from Embodiment I is that the water retaining part 102 is an annular convex part arranged on the inner side of the washing drum 1. The upper surface of the annular convex part and the top of the washing drum 1 flanged inwards to form an annular groove with an inward opening of the matching part 101 of the balance ring 2.

Embodiment IV

In the present embodiment, the difference from Embodiment I is that the annular groove is an annular groove outwards sunken from the inner side of the washing drum 1, and does not include the water retaining part 102.

A lower surface of the annular groove is a supporting part for supporting the mounting part 201 of the balance ring 2; the supporting part extends upwards to form an accommodating part surrounding the mounting part 201 of the balance ring 2; and an upper end of the accommodating part is inwards flanged and rolled to form a fixing part for fixing the mounting part 201 of the balance ring 2.

The sealing structure 3 is arranged between the fixing part and the annular bulge.

The above descriptions are only preferred embodiments of the present disclosure, but are not aimed at limiting the present disclosure in any forms. Although the present disclosure is disclosed above by the preferred embodiments, the preferred embodiments are not aimed at limiting the present disclosure. Any person skilled in the art can make some changes by using the above-mentioned technical contents or modify the technical contents as equivalent embodiments of equivalent changes without departing from the scope of the technical solution of the present disclosure. Any simple alterations, equivalent changes and modifications that are made to the above embodiments according to the technical essence of the present disclosure without departing from the contents of the technical solution of the present disclosure should all fall within the scope of the solution of the present disclosure. 

1. A washing machine, comprising: a washing drum, being a water containing tub during washing; a balancing ring, being arranged on the washing drum; and a sealing structure, being arranged between the washing drum and the balancing ring, and configured to prevent water from overflowing between the washing drum and the balancing ring.
 2. The washing machine according to claim 1, wherein the balancing ring is provided with a mounting part; a matching part cooperating with the mounting part is arranged at an upper end of the washing drum, and the sealing structure is arranged between the mounting part and the matching part.
 3. The washing machine according to claim 2, wherein the mounting part comprises an annular groove with a downward opening; the matching part comprises a support extending into the annular groove; the sealing structure is arranged between the annular groove and the support.
 4. The washing machine according to claim 3, wherein the annular groove is formed in an outer side wall of the balancing ring.
 5. The washing machine according to claim 4, wherein the inner annular wall protrudes out of the outer annular wall and extends to the bottom of the balancing ring.
 6. The washing machine according to claim 3, wherein the smooth support is formed by curling an upper end of the washing drum outwards.
 7. The washing machine according to claim 3, wherein the smooth support is formed by folding an upper end of the washing drum outwards.
 8. The washing machine according to claim 1, comprising a drainage structure, wherein the drainage structure comprises a dewatering channel arranged on an outer wall of the washing drum and communicating with the washing drum for discharging water thrown out from the washing drum; and a water inlet end of the dewatering channel is arranged on an upper end of the washing drum.
 9. The washing machine according to claim 8, wherein a water inlet for cooperatively mounting the water inlet end is arranged in the washing drum; the water inlet is arranged below the balancing ring.
 10. The washing machine according to claim 1, wherein the sealing structure is an annular sealing ring which is squeezed between the washing drum and the balancing ring and has a deformation, or the sealing structure is an annular sealant.
 11. The washing machine according to claim 4, wherein the outer side wall of the balancing ring partially extends towards an inner circumference to form an annular top of the annular groove; an outer side wall of the balancing ring at an outer end of the annular top extends towards a bottom of the balancing ring to form an outer annular wall of the annular groove; and an outer side wall of the balancing ring at an inner end of the annular top extends to the bottom of the balancing ring to form an inner annular wall of the annular groove.
 12. The washing machine according to claim 4, wherein the sealing structure is arranged between the annular top and the support.
 13. The washing machine according to claim 5, wherein a protruding part of the inner annular wall is in sealed connection with the washing drum at a lower end of the support through a screw.
 14. The washing machine according to claim 4, comprising a drainage structure, wherein the drainage structure comprises a dewatering channel arranged on an outer wall of the washing drum and communicating with the washing drum for discharging water thrown out from the washing drum; and a water inlet end of the dewatering channel is arranged on an upper end of the washing drum.
 15. The washing machine according to claim 4, wherein the sealing structure is an annular sealing ring which is squeezed between the washing drum and the balancing ring and has a deformation, or the sealing structure is an annular sealant.
 16. The washing machine according to claim 3, wherein the support is a smooth support.
 17. The washing machine according to claim 9, wherein an upper edge of the water inlet is parallel to the bottom of the balancing ring.
 18. The washing machine according to claim 9, wherein the water inlet end is mounted at the water inlet in a sealed manner. 